/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.gongfutrip.trans.remoting;

import java.nio.ByteBuffer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.gongfutrip.trans.remoting.common.RemotingHelper;
import com.gongfutrip.trans.remoting.protocol.RemotingCommand;
import com.gongfutrip.trans.util.RemotingUtil;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

public class NettyEncoder extends MessageToByteEncoder<RemotingCommand> {
  private static final Logger log = LoggerFactory.getLogger(NettyEncoder.class);

  @Override
  public void encode(ChannelHandlerContext ctx, RemotingCommand remotingCommand, ByteBuf out)
      throws Exception {
    try {
      ByteBuffer header = remotingCommand.encodeHeader();
      out.writeBytes(header);
      byte[] body = remotingCommand.getBody();
      if (body != null) {
        out.writeBytes(body);
      }
    } catch (Exception e) {
      log.error("encode exception, " + RemotingHelper.parseChannelRemoteAddr(ctx.channel()), e);
      if (remotingCommand != null) {
        log.error(remotingCommand.toString());
      }
      RemotingUtil.closeChannel(ctx.channel());
    }
  }
}
